Hello,
Just updated my system from CvH's build of 8.2.0 to 8.2.5. (Had no issues with that build of 8.2.0 whatsoever, just trying to remain current). Everything seems to work fine except live TV. TVHeadend interface looks good, but the TV card appears with only the ATSC-T option as mentioned above in the OP. When I attempt to launch live TV is does nothing & after 30 seconds displays "Tvheadend HTSP Client No Signal". For now I will restore a backup of 8.2.0.
Any advice would be appreciated.